Train Smarter.
Race Better.
Data-driven tools to dial in your nutrition, pacing, and race day strategy.
Even Splits Lab is where endurance training meets real numbers. Our articles break down how to train, fuel, and race smarter, with simple calculators to dial in your pacing, nutrition, sweat rate, and heart rate zones. Built for runners, cyclists, and triathletes who want data they can actually use.
The Lab Tools
Fuel Strategy
Running a half marathon? Most athletes need 60–90g of carbs per hour. Find your exact number in 2 minutes.
Plan Fuel
Sweat Rate
Lose more than 1L of fluid per hour without knowing it? Most athletes do. Find your hourly sweat rate in 2 minutes.
Run Test
Pacing Strategy
Want to run a sub-2:00 half? You need to hold 5:41/km. Enter your goal time and find the pace you actually need to hit.
Find Your Pace
HR Zone Finder
Training in Zone 2 but actually running in Zone 3? It happens more than you’d think. Get your personal zones in 2 minutes.
Find Your ZonesLatest From the Lab
How to Stop Stomach Issues During a Run
Nothing ends a good run faster than a sudden negotiation with your gut about whether you are going to make it home. It happens to beginners on their first long run and to experienced marathoners on race morning, which is the annoying part. Fitness does not protect you. Most runners assume it is random, decide […]
Garmin CIRQA vs Whoop vs Fitbit Air: Full Comparison
For years the screenless tracker category was basically one product with a subscription attached. That changed fast. Google launched the Fitbit Air in May 2026 at CA$129.99, and Garmin announced the CIRQA Smart Band on 21 July 2026 at CA$279.99, both of them subscription-optional. Whoop now has two direct competitors aimed squarely at the same […]
Bike Fit: Do You Really Need One?
You buy a new saddle. Then a different saddle. Then better bibs, then chamois cream. Nothing quite kills the ache in your lower back or the hands that go numb after an hour. That was me for a while. I kept treating the symptoms and never looked at the thing causing them, which was how […]